In an alternate 1914 Europe, fifteen-year-old Austrian Prince Alek, on the run from the Clanker Powers who are attempting to take over the globe using mechanical machinery, forms an uneasy alliance with Deryn who, disguised as a boy to join the British Air Service, is learning to fly genetically engineered beasts. It is the cusp of World War I. The Austro-Hungarians and Germans have their Clankers, steam-driven iron machines loaded with guns and...

Beryl lives in a world full of toys. But these aren't your ordinary toys-they're mechanical marvels that almost seem alive! And at the slightest touch, these toys "catalyze," that is, they merge with their owner and give them special abilities. But not Beryl. She's a Neon Knight, and Neon Knights can't catalyze. Beryl does have a special ability that no one knows about-she's an inventor who can turn a broken toy into an amazing, new creation. When...